src/hotspot/os_cpu/linux_x86/os_linux_x86.cpp

*** 618,627 ****
--- 618,650 ----
                 major,minor, result ? "DOES" : "does NOT");
    return result;
  #endif // AMD64
  }
  
+ juint os::cpu_microcode_revision() {
+   juint result = 0;
+ #if defined(IA32) || defined(AMD64)
+   // Other platforms have less repetitive cpuinfo files
+   char * line = NULL;
+   size_t len = 0;
+   ssize_t read;
+   FILE *fp = fopen("/proc/cpuinfo", "r");
+   if (fp) {
+     while ((read = getline(&line, &len, fp)) != -1) {
+       if (len > 10 && strstr(line, "microcode") != NULL) {
+         char* rev = strchr(line, ':');
+         if (rev != NULL) sscanf(rev + 1, "%x", &result);
+         break;
+       }
+     }
+     free(line);
+     fclose(fp);
+   }
+ #endif // x86 platforms
+   return result;
+ }
+ 
  bool os::is_allocatable(size_t bytes) {
  #ifdef AMD64
    // unused on amd64?
    return true;
  #else